Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 1,267,260	$ 1,605,439
Interest-bearing deposits at banks	7,602,897	8,105,197
Trading account	276,322	185,584
Investment securities (includes pledged securities that can be sold or repledged of $471,572 at March 31, 2019; $487,365 at December 31, 2018)
Available for sale (cost: $8,398,686 at March 31, 2019; $8,869,423 at December 31, 2018)	8,325,584	8,682,509
Held to maturity (fair value: $3,699,596 at March 31, 2019; $3,255,483 at December 31, 2018)	3,714,699	3,316,640
Equity and other securities (cost: $468,232 at March 31, 2019; $677,187 at December 31, 2018)	496,557	693,664
Total investment securities	12,536,840	12,692,813
Loans and leases	88,897,260	88,733,492
Unearned discount	(257,377)	(267,015)
Loans and leases, net of unearned discount	88,639,883	88,466,477
Allowance for credit losses	(1,019,337)	(1,019,444)
Loans and leases, net	87,620,546	87,447,033
Premises and equipment	1,044,761	647,408
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	43,947	47,067
Accrued interest and other assets	5,039,520	4,773,750
Total assets	120,025,205	120,097,403
Liabilities
Noninterest-bearing deposits	29,966,753	32,256,668
Savings and interest-checking deposits	52,932,297	50,963,744
Time deposits	6,501,509	6,124,254
Deposits at Cayman Islands office	1,069,191	811,906
Total deposits	90,469,750	90,156,572
Short-term borrowings	3,602,566	4,398,378
Accrued interest and other liabilities	1,889,336	1,637,348
Long-term borrowings	8,476,024	8,444,914
Total liabilities	104,437,676	104,637,212
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 731,500 shares at March 31, 2019 and December 31, 2018; Liquidation preference of $10,000 per share: 50,000 shares at March 31, 2019 and December 31, 2018	1,231,500	1,231,500
Common stock, $.50 par, 250,000,000 shares authorized, 159,741,898 shares issued at March 31, 2019; 159,765,044 shares issued at December 31, 2018	79,871	79,883
Common stock issuable, 21,324 shares at March 31, 2019; 24,563 shares at December 31, 2018	1,514	1,726
Additional paid-in capital	6,568,480	6,579,342
Retained earnings	11,842,371	11,516,672
Accumulated other comprehensive income (loss), net	(288,009)	(420,081)
Treasury stock — common, at cost — 23,126,505 shares at March 31, 2019; 21,255,275 shares at December 31, 2018	(3,848,198)	(3,528,851)
Total shareholders’ equity	15,587,529	15,460,191
Total liabilities and shareholders’ equity	$ 120,025,205	$ 120,097,403